Simplified Solar Hot Water


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Warpspeed
Guru

Joined: 09/08/2007
Location: Australia
Posts: 4406
Posted: 09:20pm 25 Aug 2019      

In theory yes, but the energy storage capacitor would need to be made much larger to run a motor.

Heat energy can be pumped effectively in very short bursts, so the system can cycle fairly rapidly with a small capacitor and it will work fine.
These short bursts of heat average out due to thermal inertia.
There might be 2Kw lasting for just a few tens of millisecinds for example.

I would think that a pump motor would need to run for at least several seconds at a time to reach working speed, and produce any worthwhile output. So the capacitor storage will need to store a fair chunk of energy.  If its for a low voltage motor, some ultracapacitos may be worth considering.

A 190v motor will probably require electrolytics, and rather a lot of them too, which might be fairly costly to get acceptable pump performance.
Cheers,  Tony.